How to fire events in runtime generated controls in C#. NET

 

I am taking an example of Link button controls

 

Generate runtime Link button and after clicking each and every button some

Alert message should get fired. This can be done in simple 2 steps.

 

Client Side Events

 

1) Make one method that will generate runtime Link button

 

public void AddButton()

{

LinkButton lbnew;

      int i=1;

      while (i<5)

      {

        lbnew=new LinkButton();             

        lbnew.Text="Link" + i + "<br>" ;

        lbnew.ID="Lnk" + i;

        Panel.Controls.Add(lbnew);

        i++;

      }

}

 

2) Call AddButton() method in OnLoad Event

 

private void Page_Load(object sender, System.EventArgs e)

{

  AddButton();

  int i;

  for(i=1;i<5;i++)

  {

     ((LinkButton)Page.FindControl("Lnk"+i)).Attributes

.Add("Onclick","alert('you have clicked link - " + i + "')");

  }

 

Server Side Events

 

1) Make one method that will generate runtime Link button

 

public void AddButton()

{

LinkButton lbnew;

      int i=1;

      while (i<5)

      {

        lbnew=new LinkButton();             

        lbnew.Text="Link" + i + "<br>" ;

        lbnew.ID="Lnk" + i;

        lbnew.CommandArgument ="Lnk" +i;

      lbnew.Click += new

System.EventHandler(this.LinkButton_Click);     

Panel.Controls.Add(lbnew);

      i++;

      }

}

 

2) This events handler will call the LivkButton_click()

 

private void LinkButton_Click(Object sender,System.EventArgs e)

{

   Response.Write("you have clicked link button”);

}

 

Summary

 

Client side

When you generate Runtime controls you must give the Id of that controls

And need to be fire with Attribute properties of that control.

 

Server side

When you what to fire event in server side you need to add Event Handler on that link button control

 

 

 

 

 

 

 

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